RKJ
| Acronym | Definition |
|---|---|
| RKJ | Rooms Katholieke Jongerengroep (Dutch: Roman Catholic Youth Group; Netherlands) |
| RKJ | Revised King James (version of the Bible) |
| RKJ | Residentieel Kortdurend Jongerenprogramma (Dutch: Short-Term Residential Youth Program; Belgium) |
| RKJ | Rotor Kick Jr. (assembly tool) |